A superb and demanding shoot'em up that shares - along with Irem's "R-Type" - the distinction of being a true innovator of its genre and, again like R-Type, completely revolutionized the humble shoot-em-up.

Gradius' eye-catching graphics guaranteed gamer interest but it was the game's genius 'weapon upgrade' system that really made the difference. Never before could players actually CHOSE how to upgrade their ship. Destroying waves of enemies would often see the player reward with an 'orb' that could be picked up. The player could collect up to 6 orbs and could effectively 'buy' an upgrade from the 6 displayed at the bottom of the play area (speed-up, bombs, double, laser, multiple - which are orbs that follow the player's movements and add greater firepower - and a mystery 6th upgrade that is marked with an '?'). Game difficulty increases depending on how many power-ups the player has, so it is sometimes advantageous to NOT power-up your ship too much.